To obtain other graphical effects external packages such as photoshop may be used.
Photoshop has been used to set a pinch effect of varying degree for an image.
Import images as above
We now need to reverse the image set to obtain a smooth back and forth animation:
Select the sprite sequence in the score by clicking anywhere in the middle of the sprite
sequence- press Command+C
(Copy), then click on the frame just after the sprite sequence and press
Command+V (Paste).
Click on this second sprite sequence and choose Modify > Reverse Sequence.
Select the 2 sprites by pressing Shift and clicking on both. Choose Modify > Join
Sprites.